Final answer:
Infants typically start their journey through the pediatrician's office immediately after birth. Regular visits allow the pediatrician to monitor the baby's health and development.
Step-by-step explanation:
The journey through a pediatrician's office usually begins immediately after birth for infants. In the first few weeks, infants typically go for their first check-up to evaluate their overall health, growth, and development. This early visit allows the pediatrician to monitor the baby's weight, height, reflexes, and assess any potential health concerns. Regular visits to the pediatrician's office continue throughout infancy and childhood.